Classification of Korean Chrysanthemum Species based on Volatile Compounds Using Cluster Analysis and Principal Component Analysis

Kim, Su Jeong,Ha, Tae Joung,Kim, Jongyun,Chang, Dong Chil,Kim, Ki Sun 한국응용생명화학회 2014 Applied Biological Chemistry (Appl Biol Chem) Vol.57 No.6

In the analysis of chemotype relationship among Korean Chrysanthemum species, the volatile compounds in the leaves of 15 taxa were analyzed and identified by gas chromatograph/mass spectrometry. Principal component analysis and cluster analysis used for the grouping based on the volatile compounds. Fifteen taxa of Charysanthemum species were categorized into three groups. Groups I and II included higher ketones than Group III. Group I had five C. zawadskii subspecies: acutilobum, acutilobum var. tenuisectum, acutilobum var. alpinum, lucidum, and coreanum. Five C. zawadskii subspecies were analyzed with main volatile compounds of D-limonene and m-thymol. Group II consisted of four C. zawadskii subspecies including naktongense, yezoense, latilobum, and latilobum var. leiophyllum, and one species C. makinoi. They consisted of main compounds of linalool, cis-chrysanthenol, eugenol, and chrysanthenone. Group III included five C. indicum species and related species: C. indicum, var. albescens, var. acuta, C. boreale, and C. lineare. The present study was able to classify volatile compounds of Korean Chrysanthemum species attributable to major compounds, such as hydrocarbons (sabinene, cymene, ${\beta}$-selinene), alcohols (1-octen-3-ol, cis-chrysanthenol, hinesol), ketones (chrysanthenone, camphor), and esters (cis-sabiene hydrate, trans-chrysanthenyl acetate).

Changes in Leaf Variegation and Coloration of English Ivy and Polka Dot Plant under Various Indoor Light Intensities

Kim, Jongyun,Kang, Seung Won,Pak, Chun Ho,Kim, Mi Seon American Society for Horticultural Science 2012 HortTechnology Vol.22 No.1

<P>Variegated foliage plants are often used in interiorscaping in low light environments. The changes in leaf morphology and coloration of two variegated foliage plants, english ivy (<I>Hedera helix</I> ‘Golden Ingot’) and polka dot plant (<I>Hypoestes phyllostachya</I>), under various light intensities [photosynthetic photon flux (<I>PPF</I>) at 2.7, 6.75, 13.5, 67.5, and 135 μmol·m<SUP>−2</SUP>·s<SUP>−1</SUP>] were investigated to elucidate their optimum indoor light environment. Digital image analysis was used to quantify the changes in variegation area and color in CIELAB color space. The changes in leaf morphology (thickness, length:width) and coloration were different between the two species. In general, growth of both species increased with increasing <I>PPF</I>. English ivy showed no significant changes in leaf variegation under different <I>PPF</I>. Under low <I>PPF</I> (≤13.5 μmol·m<SUP>−2</SUP>·s<SUP>−1</SUP>), newly developed leaves of polka dot plant had reduced leaf variegation (44%, 72%, and 85% variegation loss under 13.5, 6.75, and 2.7 μmol·m<SUP>−2</SUP>·s<SUP>−1</SUP>, respectively). Anthocyanin content in leaves of polka dot plant also decreased with decreasing <I>PPF</I>, which reduced plants’ aesthetic quality. English ivy leaves under high <I>PPF</I> (≥67.5 μmol·m<SUP>−2</SUP>·s<SUP>−1</SUP>) displayed high brightness (L*) and yellowish green color (hue angle < 108°), which diminished its aesthetic value. Smaller leaf size and narrower shape of polka dot plant leaves under high <I>PPF</I> (≥67.5 μmol·m<SUP>−2</SUP>·s<SUP>−1</SUP>) also diminished its aesthetic value. Overall, english ivy performed well in a <I>PPF</I> range from 2.7 to 13.5 μmol·m<SUP>−2</SUP>·s<SUP>−1</SUP>, and polka dot plant required a <I>PPF</I> of at least 13.5 μmol·m<SUP>−2</SUP>·s<SUP>−1</SUP> to maintain its red-purple variegation in the indoor environment.</P>

Isoform- and receptor-specific channel property of canonical transient receptor potential (TRPC)1/4 channels

Kim, Jinsung,Kwak, Misun,Jeon, Jae-Pyo,Myeong, Jongyun,Wie, Jinhong,Hong, Chansik,Kim, Sung-Young,Jeon, Ju-Hong,Kim, Hyun Jin,So, Insuk Springer-Verlag 2014 Pfl ugers Arch Vol.466 No.3

Automated Irrigation System Using Soil Moisture Sensor in Horticulture

Jongyun Kim 한국토양비료학회 2014 한국토양비료학회 학술발표회 초록집 Vol.2014 No.6

Volatile Flavor Compounds in the Leaves of Fifteen Taxa of Korean Native Chrysanthemum Species

Kim, Su Jeong,Ha, Tae Joung,Kim, Jongyun,Nam, Jung Hwan,Yoo, Dong Lim,Suh, Jong Taek,Kim, Ki Sun Korean Society of Horticultural Science 2014 원예과학기술지 Vol.32 No.4

This study was conducted to compare the volatile flavor compounds found in the leaves of 15 taxa of Korean native Chrysanthemum species. The volatile flavor compounds from the taxa were collected using a simultaneous steam distillation and extraction technique and were analyzed using gas chromatography/mass selective detector (GC/MSD). A total of 45 volatile flavor compounds were identified with six functional groups: 14 alcohols, 4 ketones, 19 hydrocarbons, 5 esters, 2 acids, and 1 aldehyde. The main functional group in 15 taxa of Chrysanthemum species was alcohols, accounting for 28.7% of volatile flavor compounds, followed by ketones (21.2%) and hydrocarbons (13.2%). Camphor, which is known for its antimicrobial properties, was the most abundant volatile compound (30%) in C. zawadskii ssp. latilobum and var. leiophyllum. In particular, C. indicum subspecies and C. boreale contained ${\alpha}$-thujone, which has outstanding anti-bacterial, anti-cancer, anti-inflammatory, anti-ulcer, and anti-diabetic efficacies. C. indicum var. albescens could be used in perfumes, since it showed 21 times more camphene than C. indicum. In addition, C. indicum var. acuta contained a fairly high content of 1,8-cineole, which has an inhibitory effect on mutagenesis. C. lineare contained only pentadecanoic acid compounds, whereas other taxa hexadecanoic acids. Overall, the Korean native Chrysanthemum species had considerable variation in volatile flavor compounds in their leaves. This study provides a good indication of specific potential use for various applications.

RNAseq-based Transcriptome Analysis of Burkholderia glumae Quorum Sensing

Kim, Sunyoung,Park, Jungwook,Kim, Ji Hyeon,Lee, Jongyun,Bang, Bongjun,Hwang, Ingyu,Seo, Young-Su The Korean Society of Plant Pathology 2013 Plant Pathology Journal Vol.29 No.3

Burkholderia glumae causes rice grain rot and sheath rot by producing toxoflavin, the expression of which is regulated by quorum sensing (QS). The QS systems of B. glumae rely on N-octanoyl homoserine lactone, synthesized by TofI and its cognate receptor TofR, to activate the genes for toxoflavin biosynthesis and an IclR-type transcriptional regulator gene, qsmR. To understand genome-wide transcriptional profiling of QS signaling, we employed RNAseq of the wild-type B. glumae BGR1 with QS-defective mutant, BGS2 (BGR1 tofI::${\Omega}$) and QS-dependent transcriptional regulator mutant, BGS9 (BGR1 qsmR::${\Omega}$). A comparison of gene expression profiling among the wild-type BGR1 and the two mutants before and after QS onset as well as gene ontology (GO) enrichment analysis from differential expressed genes (DEGs) revealed that genes involved in motility were highly enriched in TofI-dependent DEGs, whereas genes for transport and DNA polymerase were highly enriched in QsmR-dependent DEGs. Further, a combination of pathways with these DEGs and phenotype analysis of mutants pointed to a couple of metabolic processes, which are dependent on QS in B. glumae, that were directly or indirectly related with bacterial motility. The consistency of observed bacterial phenotypes with GOs or metabolic pathways in QS-regulated genes implied that integration RNAseq with GO enrichment or pathways would be useful to study bacterial physiology and phenotypes.

SEA를 이용한 자동차 웨더스트립의 음향성능 해석

임종윤(Jongyun Lim),이창수(Changsoo Lee),김도형(Dohyeong Kim),주현승(Hyunseung Joo),김헌영(Heonyoung Kim) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4

Weather strips in automotives protect not only wind, dust and water leakage but also noise from exterior environment. Weather strips are suitable to reduce noise from high frequency range over 1 ㎑. Because seals of weather strips have too many resonant modes in this frequency region, SEA approach is better candidate than general FEM/BEM approaches. With deformed geometries from non-linear deformation analysis using FEM, SEA structural subsystems according to thicknesses were modeled. Also several internal cavities between seals as well as source and receiver cavities were modeled as SEA acoustic subsystems. The results from acoustic response of receiver cavity were compared with test. Good agreements between analysis and test were reached in frequency range over 1.6 ㎑ or 1 ㎑. Although it is difficult to apply this SEA approach to geometry change in detail, acoustic performance can be predicted according to types, thicknesses, materials and clear change of geometry.

연령대와 지형경사를 고려한 근린생활권 도시녹지 보행 접근성 평가 - 청주시 원도심지를 대상으로 -

김종환(Kim, Jonghwan),김종윤(Kim, Jongyun),윤성수(Yoon, Sungsoo),문영주(Moon, Youngjoo),강완모(Kang, Wanmo) 한국지적정보학회 2021 한국지적정보학회지 Vol.23 No.3

녹지에 대한 보행 접근성은 도시민의 육체적·정신적 건강 향상에 중요하다. 하지만 거주 환경이나 신체적 조건에 따라 시민들이 접근 가능한 도시녹지 서비스의 수준은 달라질 수 있다. 본 연구는 청주시 원도심 지역을 대상으로 보행로의 경사도와 연령 그룹별(10세 이상 49세 이하의 청·장년층, 50세 이상 69세 이하의 중년층, 70세 이상의 노년층) 보행속도를 고려하여 도시녹지 접근성을 분석하였다. 접근성 분석에서 경사도가 고려되지 않았을 때 일부 노년층 거주자를 제외한 모든 연령층은 도시녹지에 10분 내로 접근할 수 있었다. 그러나 경사도를 고려했을 때 도시녹지에 10분 내로 접근할 수 없는 사람들이 중년층에서도 드러났다. 또한, 산지형태의 면적이 큰 임목지가 분포하는 행정구역은 경사도가 높은 보행로가 임목지뿐만 아니라 주변 공원으로 연결되기 때문에 상대적으로 보행 접근성이 낮은 것으로 나타났다. 이러한 결과들은 도시녹지 보행 접근성 평가 및 향상에 있어 보행능력에 영향을 끼치는 경사도와 시민의 연령도 고려해야 함을 시사한다. The pedestrian accessibility of urban green spaces is crucial in terms of improving mental and physical health of citizens. The level of services from green spaces accessible to citizens may vary depending on their residential locations or physical status. This study analyzes the pedestrian accessibility of green spaces in the old town area of Cheongju-si considering the slope of pedestrian roads and walking speed of different age groups (the young: 10-49 years, the senior: 50-69 years, and the elderly: over 70 years). All age groups except for a few elderly residents can access to urban green spaces in 10 minutes when the slope is not considered in the accessibility analysis. However, people, who cannot access to urban green spaces in 10 mins by walking, were also revealed in the senior group when considering the slope. In addition, administrative districts accounted for large mountainous areas can have relatively low pedestrian accessibility, because the high-slope pedestrian paths were connected to urban green spaces. Our results suggest that for assessing and improving the pedestrian accessibility of urban green spaces, the slope and ages, which affect on walking performance, should be considered.

다수의 통신중계 무인이동체를 위한 통신지도 작성 및 최적 위치 탐색

김종윤(Jongyun Kim),Pawel Ladosz,오현동(Hyondong Oh) 한국항공우주학회 2018 한국항공우주학회 학술발표회 논문집 Vol.2018 No.11

인공지능 기반 ‘한 학기 한 권 읽기’ 지원 웹서비스(‘책열매’) 개발 연구

김종윤 ( Kim Jongyun ),이재진 ( Lee Jaejin ),이경남 ( Lee Gyoengnam ),이소라 ( Lee Sora ),최소영 ( Choi Soyoung ),박보경 ( Park Bokyung ),안소윤 ( Ahn Soyun ),전성균 ( Jeon Seongkyun ) 국어교육학회 2021 國語敎育學硏究 Vol.56 No.4

2015 개정 국어과 교육과정에서 통합적 독서교육을 지원하기 위하여 ‘한 학기 한 권 읽기’를 교육 내용에 포함함에 따라, 교육부와 17개 시도교육청은 한 학기 한 권 읽기와 관련하여 초등학교 3~6학년 학생들과 교사의 독서교육을 지원하기 위한 웹서비스 개발 연구를 위탁하였다. 이 연구에서는 인공지능(AI)을 활용하여 초등학교 교사들이 한 학기 한 권 읽기에 활용 가능한 도서 목록 및 교수·학습 자료를 쉽게 검색·이용·공유할 수 있는 플랫폼을 개발하고자 하였다. 이를 위해 한 학기 한 권 읽기 활동 지원 도서 검색 및 추천을 위해 기존 도서 및 신간 도서 정보로 구성된 메타데이터를 기반으로 사용자 검색 빈도, 선호도, 독서 후기, 도서 랭킹 등의 사용자 데이터를 분석하여 인공지능(AI)을 활용한 도서 추천 시스템을 설계·개발하였다. 더불어 교사가 책열매에서 제공하는 기본적인 아이디어를 바탕으로 수업을 설계하도록 도서 검색 후 책에 관한 교수·학습 정보를 한눈에 활용할 수 있는 내용과 형식으로 교수·학습 자료를 개발하고 공유할 수 있도록 하였다. 본 연구는 국어교육학계에서 최초로 시도하고자 하는 인공지능(AI) 활용 시스템 개발 및 그 성과를 공유하고 앞으로의 방향성을 제시하고자 한다는 점에서 의의가 있다. In order to support students’ integrated reading education (reading one book in a semester) in the 2015 revised Korean language curriculum, the Ministry of Education and 17 provincial offices of education entrusted a web service, “Book Fruit” (https://ireading.kr) with development of study to support reading education for elementary school students and teachers. The main goal was to develop a platform to aid elementary school teachers in searching for, using, and sharing books and instructional materials that can be used for a semester’s reading curriculum. To achieve this goal, AI based book recommendation system was designed and developed by analyzing user data such as user search frequency, preferences, reading reviews, and book rankings based on metadata comprising existing and new book information. Additionally, instructional materials for teachers and reward systems for students were provided. In conclusion, the significance and the future direction of this study are discussed.